On Friday, March 10, 2017 at 10:52:43 AM UTC-8, John Robertson wrote:

Speaking of absolute, there is always degrees Kelvin if you want to
avoid negative numbers...

Ah, there speaks an engineer! Adiabatic demagnetization (or population
inversion in lasers, for that matter) means physicists have to keep a minus
sign handy, even on Kelvin scales.

OK, physicists run into it; everyone else just reads about it.